package com.itheima.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.common.CustomException;
import com.itheima.entity.*;

import com.itheima.mapper.OrdersMapper;
import com.itheima.service.*;
import com.itheima.util.BaseContext;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;

@Service
public class OrdersServiceImpl extends ServiceImpl<OrdersMapper, Orders> implements OrdersService {
    @Autowired
    private ShoppingCartService shoppingCartService;
    @Autowired
    private OrderDetailService orderDetailService;
    @Autowired
    private UserService userService;
    @Autowired
    private AddressBookService addressBookService;

    /**
     * 用户下单
     *
     * @param orders
     */
    @Override
    @Transactional
    public void submit(Orders orders) {
        //获取当前用户id
        Long userid = BaseContext.getCurrentId();
        //查询当前用户购物车
        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId, userid);
        List<ShoppingCart> list = shoppingCartService.list(queryWrapper);
        if (list == null || list.size() == 0) {
            throw new CustomException("购物车为空，不能下单");
        }
        //查询用户数据
        User user = userService.getById(userid);
        //查询地址数据
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);
        if (addressBook == null) {
            throw new CustomException("地址信息有误，不能下单");
        }
        //计算总金额
        AtomicInteger amount = new AtomicInteger(0);
        for (ShoppingCart shoppingCart : list) {
            amount.addAndGet(shoppingCart.getAmount().multiply(new BigDecimal(shoppingCart.getNumber())).intValue());
        }
        //向订单表中插入数据一条数据
        long orderId = IdWorker.getId();//订单号
        orders.setId(orderId);
        orders.setUserId(userid);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));//总金额
        orders.setUserId(userid);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
        this.save(orders);
        //向订单明细表中插入多条数据
        Long ordersId = orders.getId();
        for (ShoppingCart shoppingCart : list) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(shoppingCart, orderDetail, "id");
            orderDetail.setOrderId(ordersId);
            orderDetailService.save(orderDetail);
        }
        //清空购物车
        LambdaQueryWrapper<ShoppingCart> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.eq(ShoppingCart::getUserId, userid);
        shoppingCartService.remove(lambdaQueryWrapper);
    }
}
